#14414: Profiled program runs 2.5x faster than non-profiled -------------------------------------+------------------------------------- Reporter: Fuuzetsu | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by bgamari): I must be missing something; I can't reproduce on Linux with GHC 8.2.1 and LLVM 3.9.1. ||= Flags = ||= NCG =||= NCG =||= LLVM =||= LLVM =|| || ||= MUT =||= GC =||= MUT =||= GC =|| || `-O0` || 24.8 || 5.42 || 24.22 || 5.42 || || `-O1` || 6.55 || 1.24 || 4.38 || 0.73 || || `-O2` || 5.37 || 0.91 || 4.28 || 0.83 || || `-O1 -prof` || 8.68 || 1.68 || 7.78 || 1.36 || || `-O2 -prof` || 8.28 || 1.47 || 7.13 || 1.58 || || `-O1 -prof -fprof-auto` || 17.63 || 1.72 || 17.01 || 1.95 || || `-O2 -prof -fprof-auto` || 15.26 || 1.71 || 14.36 || 1.64 || -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14414#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler